diff --git a/packages/dashboard/app/components/GitHubImportModal.css b/packages/dashboard/app/components/GitHubImportModal.css
index cef0f4aa69..53f3aa8730 100644
--- a/packages/dashboard/app/components/GitHubImportModal.css
+++ b/packages/dashboard/app/components/GitHubImportModal.css
@@ -1567,8 +1567,24 @@ counterpart added later cannot silently reintroduce the band.
     align-self: flex-start;
   }
 
+  /*
+  FNXC:GitHubImport 2026-07-16-19:00:
+  FN-8150 requires populated GitHub, pull request, and GitLab lists to use the remaining height of
+  the mobile full-screen sheet rather than stopping at a 50vh cap. The GitHub list pane becomes a
+  constrained flex column so the list owns internal scrolling while pagination and the Cancel bar
+  remain reachable; the shared list rule also lets the stretched GitLab workspace list fill its row.
+  */
+  .github-import-list-pane .github-import-pane-content {
+    display: flex;
+    flex-direction: column;
+    min-height: 0;
+    overflow: hidden;
+  }
+
   .issues-list {
-    max-height: 50vh;
+    flex: 1 1 auto;
+    min-height: 0;
+    max-height: none;
   }
 
 
diff --git a/packages/dashboard/app/components/__tests__/GitHubImportModal.test.tsx b/packages/dashboard/app/components/__tests__/GitHubImportModal.test.tsx
index 96a2a843aa..5c31e362e1 100644
--- a/packages/dashboard/app/components/__tests__/GitHubImportModal.test.tsx
+++ b/packages/dashboard/app/components/__tests__/GitHubImportModal.test.tsx
@@ -114,6 +114,23 @@ describe("GitHubImportModal", () => {
 
 
 
+  it("lets mobile issues lists fill the sheet without a 50vh cap", () => {
+    const source = readFileSync(resolve(__dirname, "../GitHubImportModal.css"), "utf8");
+    const mobileStyles = source.slice(
+      source.indexOf("@media (max-width: 640px)"),
+      source.indexOf("@keyframes github-import-spinner-spin"),
+    );
+
+    expect(mobileStyles).not.toContain("max-height: 50vh");
+    expect(mobileStyles).toContain(".github-import-list-pane .github-import-pane-content {");
+    expect(mobileStyles).toContain("display: flex;");
+    expect(mobileStyles).toContain("flex-direction: column;");
+    expect(mobileStyles).toContain(".issues-list {");
+    expect(mobileStyles).toContain("flex: 1 1 auto;");
+    expect(mobileStyles).toContain("min-height: 0;");
+    expect(mobileStyles).toContain("max-height: none;");
+  });
+
   it("keeps the non-embedded modal body and dialog sizing rules unchanged", () => {
     const source = readFileSync(resolve(__dirname, "../GitHubImportModal.css"), "utf8");
     const baseModalBodyRule = source.match(/(?:^|\n)\.github-import-modal__body\s*\{[^}]*\}/)?.[0] ?? "";